5970b313d46670b3f102ac51571558532dec4e7c6720d3ee6fdd57909b1d7e2f

Analysis

max time kernel
150s
max time network
147s
platform
windows10-2004_x64
resource
win10v2004-20240221-en
resource tags

arch:x64arch:x86image:win10v2004-20240221-enlocale:en-usos:windows10-2004-x64system
submitted
23-02-2024 07:00

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General

Target

2024-02-23_da324e651adf73f696a5cc519bd7b40b_cryptolocker.exe
Size

39KB
MD5

da324e651adf73f696a5cc519bd7b40b
SHA1

9bc3fe5da73d463ad3d72ed9d892ff06b5dea343
SHA256

5970b313d46670b3f102ac51571558532dec4e7c6720d3ee6fdd57909b1d7e2f
SHA512

1cd80e6402caac974c62f852750d66c02f6fd79b45b7618e12929714a5ea30a794cca27b4a181e7544efd7c201255fbf656572d1960ca7849e33f07aa0a55e3b
SSDEEP

384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSznHzl6AJvDSuYlxujsFwI:b/yC4GyNM01GuQMNXw2PSjHPbSuYlaJI

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x0007000000023228-12.dat	CryptoLocker_rule2

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-910440534-423636034-2318342392-1000\Control Panel\International\Geo\Nation	2024-02-23_da324e651adf73f696a5cc519bd7b40b_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4836	retln.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2168 wrote to memory of 4836	2168	2024-02-23_da324e651adf73f696a5cc519bd7b40b_cryptolocker.exe	88
PID 2168 wrote to memory of 4836	2168	2024-02-23_da324e651adf73f696a5cc519bd7b40b_cryptolocker.exe	88
PID 2168 wrote to memory of 4836	2168	2024-02-23_da324e651adf73f696a5cc519bd7b40b_cryptolocker.exe	88

C:\Users\Admin\AppData\Local\Temp\2024-02-23_da324e651adf73f696a5cc519bd7b40b_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-23_da324e651adf73f696a5cc519bd7b40b_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2168
- C:\Users\Admin\AppData\Local\Temp\retln.exe
  "C:\Users\Admin\AppData\Local\Temp\retln.exe"
  2⤵
  - Executes dropped EXE
  PID:4836

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\retln.exe

Filesize
39KB

MD5
8b0573bf8e26df82baef2ea1d91a42ee

SHA1
2578ba77dcc105d343f168e15a6bf3aaa4097fc9

SHA256
cbecd63d4984a278eb7b3421cc997e54778a96d4d14382d4b4205f36dfc02355

SHA512
a9d7aaedc59d0e73bdff64499e5f8393f7d8898925e657bc1271549c5f5988c8536df66a53a6f1c8670138f17e21f32a61929731c76623e978d92b169e8211e6

Download Submit
memory/2168-0-0x0000000002350000-0x0000000002356000-memory.dmp

Filesize
24KB

Download
memory/2168-1-0x0000000002350000-0x0000000002356000-memory.dmp

Filesize
24KB

Download
memory/2168-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/4836-23-0x0000000000670000-0x0000000000676000-memory.dmp

Filesize
24KB

Download